IGRT - The ISPN Guide to Pediatric Neurosurgery

IGRT

Image-guide radiation therapy.  This refers to using CT or MRI imaging to define the dimensions of the volume of tissue being treated by radiation.  The three dimensional volume of the targeted area of radiation are defined on the images then related to the space in the patient that contains the target for radiation precisely.  Once so defined the coordinates for the target as defined on the images is used to guide the delivery of radiation to the precisely related volume of the target within the patient.